source: t29-www/en/miscellaneous.php @ 311

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Zusammenführung der englischen neuen Homepage mit den unterdessen veränderten Texten der englischen laufenden Homepage.

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1<?php
2        $seiten_id = 'sonstiges';
3        $version = '$Id: miscellaneous.php 287 2012-08-16 09:02:07Z heribert $';
4        $title = 'Miscellaneous';
5       
6        require "../lib/technikum29.php";
7?>
8    <h2>Miscellaneous</h2>
9
10    <h3>Pianola</h3>
11    <p>The technikum29 is quite versatile &ndash; beside all the communication
12       and computer technology we also show very special exhibits: This is
13       a fully executable pianola, year of manufacture about 1910-1915.</p>
14
15    <p>
16       It's a great experience see and hear such old jukeboxes, typically made
17       only of natural materials like leather, gum, wood, bone glue, felt, metal, paper,
18       ivory and glas.
19       <br/>By assembling these elements on an intelligent way, one could
20       build a simple mechanical machine which is especially impressive
21       for today's people. Here at the technikum29, we will show you how
22       this device works, we will explain the basic functionality and
23       play challenging compositions. While having covers removed, you can
24       even see the fascinating mechanics working.
25    </p>
26
27     <div class="box center">
28       <img src="/shared/photos/kommunikationstechnik/pianola.jpg"
29         alt="Picture of the Pianola" width="700" height="618" class="nomargin-bottom" />
30     </div>
31
32        <h3 id="leander">Art in the Museum</h3>
33
34<p>The technikum29 motivates activities that get awards and prices. The latest
35example is that of the young artist Leander A. Schwarzer who transforms
36everyday things into pieces of art. He has developed pictures made from zippers
37that can be opened thus giving the viewer the opportunity to modify the picture
38itself.<br>
39 His latest visit to the technikum29 has inspired him to make art from
40and with punch cards which were the basis of industrialization in the 20th
41century. First the "Terzett" (Trio) was created which consists of three punched
42cards with these irreversible sentences:</p>
43
44<div class="box left">
45        <img src="/shared/photos/start/lk.jpg"  width="250" height="350" class="nomargin-bottom" />
46                <p class="Bildtext small">Picture 1: 3 punch cards with text</p></div>
47               
48        ANOTHER WORLD IS POSSIBLE<br>
49        IMPOSSIBLE IS NOTHING<br>
50        IMAGINE ALL THE PEOPLE<br>
51        <div class="box right">
52        <img src="/shared/photos/start/leander.jpg" alt="Leander Schwarzer" width="313" height="239" class="nomargin-bottom" />
53                <p class="Bildtext small">Picture 2: Leander A. Schwarzer punching cards on an IBM key punch</p>
54               
55                </div>
56
57<p>These cards were hanged on a wall at a distance of 1-2 cm. During the day sun
58rays create shadows of the punched and coded text on the wall behind the cards.
59This work of art was awarded a price at the 32th grafics competition in Austria
60(Innsbruck, 2011). This in turn motivated Mr. Schwarzer to continue his work
61with punched cards. He spent several days at the technikum29 punching excerpts
62from Marx' "Capital" thereby creating a pile of several hundred cards. These
63were shown in the exhibition "A Symbol of Freedom" in Piacenza (Italy). Punched
64cards transform contemporary slogans into visual paradoxes when they create
65their unique shadows.</p>
66<div class="box left">
67        <img src="/shared/photos/start/lk-musik.jpg" alt="Musik aus Lochkarten" width="336" height="188" class="nomargin-bottom" />
68                <p class="Bildtext small">Picture 3: Punched cards running through a "musical clock"</p>
69                </div>
70
71<p>Another work, "Fetish Character of commodities", concatenates the cards
72containing Marx' text fragments. This string of cards is then pulled through a
73mechanism like a musical clock that generates sounds controlled by the holes in
74the cards. So, finally, the "Capital" is transformed into atmospheric sounds.</p><br>
75
76         
77         
78         
79    <h3>Movie projector  "Dresden 1"</h3>
80
81     <div class="box left clear-after">
82        <img src="/shared/photos/kommunikationstechnik/kinomaschine.dresden1.jpg"
83           alt="Photography of the movie projector Dresden 1" width="350" height="630" />
84
85                <div class="bildtext">
86          <p>The technikum29 has a movie projector from 1951 (there are
87             more and even older projectors from the 1930s that are stored in the
88             archive for lack of space).</p>
89          <p>
90             Movie projectors have always been very complex devices. At that time,
91             the bright picture projection was archived with an arc light which was
92             generated between two carbon pencils. The waste heat was deflected via a
93             chimney pipe! <!-- stupid mode... -->
94             Since the pencils got shorter and shorter while the movie went on, they
95             had to be moved continously closer together for producing a constant
96             luminosity. Otherwise the light goes out.
97             <br/>We will repair this device to show an original newsreel from the 1960s.
98         </p>
99           </div>
100        </div>
101               
102        <h3 id="demo">Siemens Demonstration Computer</h3>
103        <div class="box center">
104        <img src="/shared/photos/rechnertechnik/siemens-democomputer.jpg" alt="Siemens demonstration educational computer CPU" width="700" height="587" />
105                <p class="center"><b>Siemens educational computer</b></p>
106        </div>
107
108        <p>This demonstration model was build in 1973, when personal computers were not
109           invented for a long time yet. Engineers had to be trained to understand
110           computer architectures. Therefore, this big education model was constructed.
111           It is a giant implementation of a typical register machine where 126 lamps
112           display all registers, control, ALU and RAM, including the data flow.
113           Featuring a mutable clock pulse and only 4 bit word with, elementary opcodes
114           could be reproduced in a very illustrative way. The device can be toggled to
115           process one instruction or one cycle a time.
116        <br>On the left side, the computer program could be directly "written" by plugging
117           cartidges labeled with assembly instruction mnemonics or numerical values
118           (immediate operands). On this cartiges the user could directly read the binary
119           value of the machine instruction which will be the content of the corresponding
120           random access field. As you might guess, the computer cannot change the program
121           memory without user interaction, so this model actually implements an Harvard
122           architecture, even though the (german) labels on the frontend suggest something
123           different.
124        <br>The picture above shows a currently running program that adds memory cells. It
125           shows that computer word lengths do not limit the length of proccessable
126           numbers.
127        <br>It is a wonderful device that can even be used today to understand the elementary
128           workflow of modern high end desktop CPUs.
129    </p>       
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